<template>
  <div class="login-dialog">
    <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          size="large"
          auto-complete="off"
          placeholder="账号"
        >
          <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          size="large"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter="handleLogin"
        >
          <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          v-model="loginForm.code"
          size="large"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter="handleLogin"
        >
          <template #prefix><svg-icon icon-class="validCode" class="el-input__icon input-icon" /></template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img"/>
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="large"
          type="primary"
          style="width:100%;"
          @click.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div style="float: right; margin-top: 10px;">
          <a href="#" class="link-type" @click.prevent="showRegister">立即注册</a>
        </div>
      </el-form-item>
    </el-form>
  </div>
</template>

<script setup>
import { ref, getCurrentInstance } from 'vue'
import Cookies from "js-cookie"
import { encrypt, decrypt } from "@/utils/jsencrypt"
import { getCodeImg } from "@/api/login"
import useUserStore from '@/store/modules/user'

const emit = defineEmits(['login-success', 'show-register'])

const userStore = useUserStore()
const { proxy } = getCurrentInstance()

const loginForm = ref({
  username: "admin",
  password: "admin123",
  rememberMe: false,
  code: "",
  uuid: ""
})

const loginRules = {
  username: [{ required: true, trigger: "blur", message: "请输入您的账号" }],
  password: [{ required: true, trigger: "blur", message: "请输入您的密码" }],
  code: [{ required: true, trigger: "change", message: "请输入验证码" }]
}

const loading = ref(false)
const codeUrl = ref("")
const captchaEnabled = ref(true)

function handleLogin() {
  proxy.$refs.loginRef.validate(valid => {
    if (valid) {
      loading.value = true
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.value.rememberMe) {
        Cookies.set("username", loginForm.value.username, { expires: 30 })
        Cookies.set("password", encrypt(loginForm.value.password), { expires: 30 })
        Cookies.set("rememberMe", loginForm.value.rememberMe, { expires: 30 })
      } else {
        // 否则移除
        Cookies.remove("username")
        Cookies.remove("password")
        Cookies.remove("rememberMe")
      }
      // 调用action的登录方法
      userStore.login(loginForm.value).then(() => {
        // 登录成功后获取用户信息
        return userStore.getInfo()
      }).then(() => {
        loading.value = false
        emit('login-success')
      }).catch(() => {
        loading.value = false
        // 重新获取验证码
        if (captchaEnabled.value) {
          getCode()
        }
      })
    }
  })
}

function getCode() {
  getCodeImg().then(res => {
    captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled
    if (captchaEnabled.value) {
      codeUrl.value = "data:image/gif;base64," + res.img
      loginForm.value.uuid = res.uuid
    }
  })
}

function showRegister() {
  emit('show-register')
}

function getCookie() {
  const username = Cookies.get("username")
  const password = Cookies.get("password")
  const rememberMe = Cookies.get("rememberMe")
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
  }
}

getCode()
getCookie()
</script>

<style lang='scss' scoped>
.login-dialog {
  .login-form {
    .el-input {
      height: 40px;
      input {
        height: 40px;
      }
    }
    .input-icon {
      height: 39px;
      width: 14px;
      margin-left: 0px;
    }
  }
  
  .link-type {
    color: #409eff;
    text-decoration: none;
    cursor: pointer;
    
    &:hover {
      color: #66b1ff;
    }
  }
  
  .login-code {
    width: 33%;
    height: 40px;
    float: right;
    
    img {
      cursor: pointer;
      vertical-align: middle;
    }
  }
  
  .login-code-img {
    height: 40px;
    padding-left: 12px;
  }
}
</style>
